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*Conductor Size

Table 9.1.1.9 Alternating-Current Resistance and Reactance for 600-Volt Cables,-Phase, 60 Hz, 7SC -Three Single Conductors in Conduit

m

Ohms to Neutral per 305 m

X|, (Reactance) for All Wires

Alternating-Current Resistance for Uncoated

Copper WiresAlternating-Current

Resistance for Aluminum Wires

Effective Z at 0.85 PF for Uncoated Copper Wires

Effective Z at 0.85 PF for Aluminum Wires

PVC, Aluminum Conduits

SteelConduit

PVCConduit

AluminumConduit

SteelConduit

PVCConduit

AluminumConduit

SteelConduit

PVCConduit

AluminumConduit

SteelConduit PVCConduit

AluminumConduit

SteelConduit

2.0 (1.6) 0,058 0.073 3.1 3.1 3.1 2.7 2.7 2.7 ----- ------ -----------3.5 (2.0) 0.054 0.068 2.0 2.0 2.0 3.2 3.2 3.2 1.7 1,7 1.7 2.8 2.8 2.85 .5 (26) 0.050 0.063 1.2 1.2 1.2 2.0 2.0 2.0 1.1 1.1 1.1 1.8 1,8 1.88.0 (3.2) 0.052 0.065 0.78 0.78 0.78 1.3 1.3 1.3 0.69 0.69 0.70 1,1 1.1 1.1

14 0.051 0.064 0.49 0.49 0.49 0.81 0.81 0.81 0.44 0.45 0.45 0,71 0.72 0.7222 0.048 p. 060 0.31 0.31 0.31 0.51 0,51 0.51 0.29 0.29 0.30 0.46 0.46 0.4630 0.045 0.057 0.19 0.20 0.20 0.32 0.32 0.32 0.19 0.19 0.20 0,30 0.30 0.3038 0.046 0.057 0.15 0.16 0.16 0.25 0.26 0.25 0.16 0.16 0.16 0.24 0.24 0.2550 0.044 0.055 0.12 0.13 0.12 0.20 0,21 0.20 0.13 0 13 0.13 0.19 0.20 0.2060 0.043 0,054 0.10 0.10 0,10 0.16 0.16 0,16 0.11 0.11 0.11 0,16 0.16 0.1680 0.042 0.052 0.077 0.082 0.079 0.13 0.13 0.13 0,088 0.092 0.094 0.13 0.13 0.14100 0.041 0.051 0.062 0.067 0.063 0,10 0.11 0.10 0.074 0.078 0.080 0.1 1 0,11 0.1 1125 0.041 0.052 0.052 0.057 0.054 0.085 0,090 0.086 0.066 0.070 0.073 0.094 0.098 0.10150 0.041 0.051 0.044 0.049 0.045 0.071 0.076 0.072 0.059 0.063 0.065 0,082 0.086 0.088175 0.040 0.050 0.038 0.043 0.039 0.061 0.066 0.063 0.053 0.058 0.060 0.073 0.077 0.080200 0.040 0.049 0,033 0.038 0.035 0.054 0.059 0.055 0.049 0.053 0.056 0.066 0.071 0.073250325375400500

0.0390.0390.0380,0380.037

0.0480.0480.0480.0480.046

0.0270.0230.0190.0190.015

0.0320.0280,0240.0240.019

0.0290.0250.0210.0210.018

0,0430.0360.0290.0290.023

0.0480.0410.0340.0340.027

0.0450.0380,0310.0310.025

0.0430.0400.0360.0360.032

0,0480.0440.0400.0400.036

0.0500,0470.0430.0430.040

0.0570.0510.0450.0450.039

0.0610.0550.0490.0490.042

0,0640.0580.0520.0520.046

Notes:1. These values are based on the following constants: UL-type RHH wires with Class B stranding, in cradled configuration. Wire conductivities are 100 percent IACS

copper and 61 percent IACS aluminum, and aluminum conduit is 45 percent IACS. Capacitive reactance is ignored, since it is negligible at these voltages.These resistance values are valid only at 75C and for the parameters as given, but are representative for 600-volt wire types operating at 60 Hz.2. Effective Z is defined as R cos(0) + X sin(0), where 0 is the power factor angle of the circuit. Multiplying current by effective impedance gives a good approximation

for line-to-neutral voltage drop. Effective impedance values shown in this table are valid only at 0.85 power factor.For another circuit power factor (PF), effective impedance (Ze) can be calculated from R and XL values given in this table as follows:Z e - R x P F + Xt sin[arccos(PF)J.

9.1.1.9 CHAPTER

9-TABLES 1506